HANDSON EXERCISES Part 3 Basic Dispersion Simulations PCHYSPLIT

HANDS-ON EXERCISES Part 3: Basic Dispersion Simulations PC-HYSPLIT WORKSHOP 3 -1

Example Simulations Presented on the following slides are several basic dispersion simulations that you can run prior to viewing the next few sections of the workshop. The next sections delve more deeply into the inner workings of the model and the advanced settings of the GUI. The first slide of each example will present the problem to be answered, the next few slides will show the GUI inputs, and the last slide will show the resulting map. It is recommended to click on the Reset button of the main HYSPLIT menu before proceeding in order to clear out any old cases in the working directory. Note: These runs were produced using HYSPLIT version 4. 9 (released January 2010). Slight differences are possible with older/newer versions of the model. PC-HYSPLIT WORKSHOP 3 -2

Example 1: Basic Dispersion Source Location: New Orleans, LA (30. 05 N, 90. 03 W) @ 10 meters AGL Source Duration: 1 unit/hr source emission for 2 hours Date/Time: February 18, 2009 @ 1200 UTC Duration: Forward, 6 hours Output: 6 -hour average concentration between the surface and 100 meters Grid Spacing: 0. 05 degrees latitude and longitude Grid Span: 20. 0 degrees latitude and longitude Deposition: None Meteorology: NAM 12 km SE US tile (hysplit. t 12 z. namsf. SEtilew) Display: Zoom set to 50% Optional Google Earth PC-HYSPLIT WORKSHOP 3 -3

Example 1: Inputs Setting the starting location and meteorology: PC-HYSPLIT WORKSHOP 3 -4

Example 1: Inputs Defining the emissions and concentration grid: PC-HYSPLIT WORKSHOP 3 -5

Example 1: Inputs To display the concentration results, choose Contours from the Concentration / Display / Concentration menu. PC-HYSPLIT WORKSHOP 3 -6

Example 1: Results PC-HYSPLIT WORKSHOP 3 -7

Example 2: Basic Dispersion Source Location: New Orleans, LA (30. 05 N, 90. 03 W) @ 10 meters AGL Source Duration: 1 unit/hr source emission for 2 hours Date/Time: February 18, 2009 @ 1200 UTC Duration: Forward, 4 hours Output: 30 -minute average concentration between the surface and 100 m Grid Spacing: 0. 01 degrees latitude and longitude Grid Span: 10. 0 degrees latitude and longitude Deposition: None Meteorology: NAM 12 km SE US tile (hysplit. t 12 z. namsf. SEtilew) Display: Zoom set to 90% Add four 50 km rings Add county map background (file map_county) Fix exponential contours Optional: Create animated gif image PC-HYSPLIT WORKSHOP 3 -8

Example 2: Inputs Setting the starting location and meteorology: PC-HYSPLIT WORKSHOP 3 -9

Example 2: Inputs Defining the concentration grid: PC-HYSPLIT WORKSHOP 3 -10

Example 2: Inputs Displaying the results with range rings and county borders: PC-HYSPLIT WORKSHOP 3 -11

Example 2: Results Creating an animated gif: PC-HYSPLIT WORKSHOP 3 -12